JPS54108239A - Ensuring no earth of transmission line - Google Patents
Ensuring no earth of transmission lineInfo
- Publication number
- JPS54108239A JPS54108239A JP1573478A JP1573478A JPS54108239A JP S54108239 A JPS54108239 A JP S54108239A JP 1573478 A JP1573478 A JP 1573478A JP 1573478 A JP1573478 A JP 1573478A JP S54108239 A JPS54108239 A JP S54108239A
- Authority
- JP
- Japan
- Prior art keywords
- earth connection
- transmission line
- earth
- point
- beat current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Electric Cable Installation (AREA)
Abstract
PURPOSE: To make a detection work with ease for a presence of earth connection between two points of the transmission line, by means of detecting a beat current of difference of the frequencies generated in the earth-connected wire.
CONSTITUTION: A-class earth connection E1, E2 is installed to a substation C, D at both ends of a transmission line W. An operational earth connection Ex is provided between construction sections A, B in the above transmission line. With a clamp- type inductive power source K1, K2 installed to A, B, an AC voltage V1, V2 of frequency f1, f2 is applied to the transmission line W, simultaneously with the outside of K1, K2 applied an earth connection of EA, EB. At this time, if removed the operational earth connection Ex, existent in the section of AB, after a completion of the construction, the voltages V1, V2 are cancelled by each other, with a beat current of f = f1, - f2 flowing in the earth connection EA at the point A. On the contrary, if existent still the earth connection point Ex, and V1 V2 earth are connected at that point not being overlapped to each other, thus with no beat current flowing.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1573478A JPS54108239A (en) | 1978-02-14 | 1978-02-14 | Ensuring no earth of transmission line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1573478A JPS54108239A (en) | 1978-02-14 | 1978-02-14 | Ensuring no earth of transmission line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54108239A true JPS54108239A (en) | 1979-08-24 |
Family
ID=11896987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1573478A Pending JPS54108239A (en) | 1978-02-14 | 1978-02-14 | Ensuring no earth of transmission line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54108239A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008283765A (en) * | 2007-05-09 | 2008-11-20 | Chugoku Electric Power Co Inc:The | Device and system for detecting working ground wire, and working ground wire |
-
1978
- 1978-02-14 JP JP1573478A patent/JPS54108239A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008283765A (en) * | 2007-05-09 | 2008-11-20 | Chugoku Electric Power Co Inc:The | Device and system for detecting working ground wire, and working ground wire |
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